// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_
#define NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_

#include <stddef.h>

#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "net/base/ip_endpoint.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_packet_writer.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_types.h"
#include "net/udp/datagram_client_socket.h"

namespace net {

// Chrome specific packet writer which uses a datagram Socket for writing data.
class NET_EXPORT_PRIVATE QuicChromiumPacketWriter : public QuicPacketWriter {
public:
    QuicChromiumPacketWriter();
    explicit QuicChromiumPacketWriter(Socket* socket);
    ~QuicChromiumPacketWriter() override;

    // QuicPacketWriter
    WriteResult WritePacket(const char* buffer,
        size_t buf_len,
        const IPAddress& self_address,
        const IPEndPoint& peer_address,
        PerPacketOptions* options) override;
    bool IsWriteBlockedDataBuffered() const override;
    bool IsWriteBlocked() const override;
    void SetWritable() override;
    QuicByteCount GetMaxPacketSize(const IPEndPoint& peer_address) const override;

    void OnWriteComplete(int rv);
    void SetConnection(QuicConnection* connection) { connection_ = connection; }

protected:
    void set_write_blocked(bool is_blocked) { write_blocked_ = is_blocked; }

private:
    Socket* socket_;
    QuicConnection* connection_;

    // Whether a write is currently in flight.
    bool write_blocked_;

    base::WeakPtrFactory<QuicChromiumPacketWriter> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(QuicChromiumPacketWriter);
};

} // namespace net

#endif // NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_
